[aprssig] Fw: APRS-B?

Lawrence LaBranche capdiamont at yahoo.com
Tue Jun 25 18:31:18 CDT 2013


I would love to see a translator digipeater. It would aid in cross messaging and testing of OpenTrac implementations. 

Lawrence LaBranche KI6ZQY

On Jun 25, 2013, at 9:30, "Andrew P. " <andrewemt at hotmail.com> wrote:

> Oops. Hit "Reply" instead of "Reply All". See below.
> 
> Sent from my Verizon Wireless BlackBerry
> 
> -----Original Message-----
> From: "Andrew Pavlin" <AndrewEMT at hotmail.com>
> Date: Tue, 25 Jun 2013 13:29:55 
> To: PE1RDW<aprs at pe1rdw.demon.nl>
> Reply-To: AndrewEMT at hotmail.com
> Subject: Re: [aprssig] APRS-B?
> 
> And there's already at least one APRS client program that supports OpenTRAC, which is my YAAC program ("Yet Another APRS Client"). <shameless plug>
> 
> I'm fixing a few bugs in the OpenTRAC support in the upcoming build 26. 
> 
> Would there be interest in a protocol-translating OpenTRAC-to-APRS digipeater (working both ways)?
> 
> Andrew Pavlin, KA2DDO
> author of YAAC
> http://www.ka2ddo.org/ka2ddo/YAAC.html
> Sent from my Verizon Wireless BlackBerry
> 
> -----Original Message-----
> From: PE1RDW <aprs at pe1rdw.demon.nl>
> Date: Tue, 25 Jun 2013 13:23:21 
> To: <aprssig at tapr.org>
> Subject: Re: [aprssig] APRS-B?
> 
> 
> Sounds like you want to use the opentrac protocol http://opentrac.org
> 
> -- 
> 73 Andre PE1RDW
> 
> On Tue, 25 Jun 2013 11:48:24 +0200, Andrew Rich <vk4tec at tech-software.net>  
> wrote:
> 
>> My dream is to have 19k2 400 MHz
>> 
>> Manchester encoded
>> 
>> Then each message has defined message types
>> 
>> 00 - General ident
>> 01 - Position report
>> 02 - GPS info
>> 03 - Velocity info
>> 04 -
>> 
>> 99 - Reserved emergency
>> 
>> - Andrew -
>> 
>> -----Original Message-----
>> From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On  
>> Behalf Of Scott Miller
>> Sent: Tuesday, June 25, 2013 8:01 AM
>> To: TAPR APRS Mailing List
>> Subject: Re: [aprssig] APRS-B?
>> 
>> I think the RFM12B code for the OTUSB is already published to SVN.  I
>> don't mind sharing that at all.  I don't remember what's different about
>> the RFM22 modules, but I'd prefer to stick with whatever is most  
>> flexible.
>> 
>> Scott
>> N1VG
>> 
>> On 6/24/2013 2:31 PM, John Wiseman wrote:
>>> I posted a message about 6 months ago about experiments with the RFM22B
>>> (100 mW) and RFM23BP (1 Watt modules). I also obtained a couple of the
>>> RFM12B (500 mw) units, but I found the interface much more difficult,
>>> and would recommend the 22/23 modules. I made a board for the Raspberry
>>> PI, and it seemed to work pretty well. and at $25 seems reasonable, but
>>> for a simple dig function the code could probalby run on the PIC.
>>> As I do a lot of sailing in the summer, the project has been put on hold
>>> till the Autumn, but if anyone is interested in preogressing the ideas,
>>> I can publish the board design and code.
>>> To save you trawling throught the archive, I'vr repeated the message  
>>> below.
>>> 73, John G8BPQ
>>> 
>>> A while ago (22 September) Bob posted a message about the RFM22 modules.
>>> I was working on a TNC for the Raspberry PI at the time, so decided to
>>> try building a TNC round these modules. There is a photo of the result  
>>> here
>>> 
>>> _https://dl.dropbox.com/u/31910649/RMF22BTNC.png_
>>> 
>>> The board is the same size as the PI (about the same as a credit card).
>>> This one is fitted with the RFM22B module, with 100 mW output, but the
>>> board will also take the 1 Watt RFM23BP. Although designed to work with
>>> the PI, it also has a header for a serial to USB converter, so it can be
>>> used as a standalone KISS TNC.
>>> 
>>> To test as a tracker I lashed up a board to connect the Adafruit
>>> Ultimate GPS Breakout board. Photo here:
>>> 
>>> _https://dl.dropbox.com/u/31910649/S1360001.jpg_
>>> 
>>> I've now got them running, and just completed my first tests. On the
>>> first trial with the 100mW version I achieved a range of just under a
>>> mile, with a
>>> 
>>> 5/8 over 5/8 70cms whip on the car, and a far from ideal Marine Band
>>> whip at base (The 70 cms colinear I bought for the test turned out to
>>> have an infinite SWR!).
>>> 
>>> Although very much a work in progress, I thought I'd share results so
>>> far - if anyone else is working with these modules I'd be interested to
>>> hear from them.
>>> 
>>> BTW, the GPS module is pretty neat as well - it is about an inch square,
>>> and includes a data logger - _https://www.adafruit.com/products/746_
>>> 
>>> 73, John G8BPQ
>>> 
>>> ?
>>> 
>>> 
>>> ------------------------------------------------------------------------
>>> *From:* aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] *On
>>> Behalf Of *Robert Bruninga
>>> *Sent:* 24 June 2013 13:55
>>> *To:* aprssig at tapr.org
>>> *Subject:* [aprssig] APRS-B?
>>> 
>>> I'm impressed with the 500 mw transceivers on 433 MHz costing $20 or so
>>> and operating at 9600 baud.
>>> 
>>> Why don't we call this APRS-B (plan B).  And start paralleling our
>>> network with these devices.
>>> 
>>> Then instead of only 5% of hams having APRS capability, we could get
>>> more people in the clubs to own a device and also to put one up at home
>>> so we have a backup data channel as well?
>>> 
>>> Maybe lots of you are doing this alrady and I am the last one to the
>>> party.  But whatever we do, lets standardize on something so we are all
>>> headed in the same direction.
>>> 
>>> These are wideband devices, so they are not compatible with any existing
>>> APRS or other ham FM radios.  That is why it is a fresh start.  What is
>>> the sync and key up time?
>>> 
>>> Sure the range of 500mw is small, but at only 10% of the cost of a digi
>>> we can put them at more and closer places and even solar power them.
>>> 
>>> Bob, WB4APR
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> aprssig mailing list
>>> aprssig at tapr.org
>>> http://www.tapr.org/mailman/listinfo/aprssig
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